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5 Troubleshooting
NJ-series CPU Unit Hardware User’s Manual (W500)
5-2 Troubleshooting
5
5-2-4 Error Descriptions
* For details, refer to I/O Operation for Major Fault Level Controller Errors on page 5-6.
Event name Non-volatile Memory Data Corrupted Event code 1002 0000 hex
Meaning A file that must be in non-volatile memory is missing or corrupted.
Source PLC Function Module Source details None Detection
timing
At power ON or
Controller reset
Error attributes Level Major fault Recovery Cycle the power
supply or reset
the Controller.
Log category System
Effects User program Stops. Operation Stops.*
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
The Controller power supply was
turned OFF while the BUSY indicator
was lit.
Clear all of memory and then down-
load the project from the Sysmac Stu-
dio.
Do not turn OFF the power supply
while the BUSY indicator is lit.
The power supply to the Controller
was interrupted momentarily while the
BUSY indicator was lit.
Take appropriate measures to ensure
that the specified power with the rated
voltage and frequency is supplied in
places where the power supply is
unstable.
The CPU Unit has failed. If this error remains even after making
the above corrections, replace the
CPU Unit.
None
Attached
information
None
Precautions/
Remarks
None
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